Changing object interior IDs quick

Alex_2259

I am making a complex map and in one of my custom interiors I have about 200 objects. I reallyy do not feel like selecting ALL of them and changing the interior ID (yes I need to do this for the map) I use MED 0.32 and how do I just quickly change all the Interior IDs of certain objects or objects I select. Any quick way to do this?